More answers

1 Attachment

What is a chain of nucleotides joined together by hydrogen bonds between the phosphate group of one nucleotide and the deoxyribose sugar of another nucleotide?
A. DNA
B. RNA
C. A helix
D. Nucleotide bonds
on tht uther one i put neutial XD

Opcode

5 years ago

Isn't that DNA [Deoxyribonucleotide]?

anonymous

5 years ago

i put helix and got it wrong bt mabey

anonymous

5 years ago

Environmental and lifestyle factors contribute to somatic mutations. Which of the following is a lifestyle factor?
A. Contaminated water
B. Lead paint
C. Nuclear radiation
D. Smoking tobacco
i didnt even know this one @ all

Opcode

5 years ago

@Reaper534
I'm not sure either I think its Nuclear radiation tho.
(@InYourHead when you get on what do you think it is?)

anonymous

5 years ago

@InYourHead

anonymous

5 years ago

i got my last 3 and im done for this one

anonymous

5 years ago

A network of canals that is covered with ribosomes is called ___________.
A. the cell membrane
B. the Golgi Apparatus
C. rough endoplasmic reticulum
D. smooth endoplasmic reticulum

Opcode

5 years ago

Oh! I know this is something to do with the endoplasmic reticulum. I'm just not sure which one :O
"Endoplasmc reticulum forms ribosomes which form protein and send them to golgi apparatus which packs them and sends them out of the cell."
So your answer is B. the Golgi Apparatus

anonymous

5 years ago

If the nucleotide sequence of a strand of complementary DNA is GTAA, what is the nucleotide sequence on the parent strand of DNA?
A. ACTT
B. CATT
C. TCGG
D. TGCC

Opcode

5 years ago

Oh I hate these types of questions -.-
Sorry I don't know :|

anonymous

5 years ago

lol ikr

anonymous

5 years ago

well thts it thx

Opcode

5 years ago

I'll leave that question to @InYourHead ....

anonymous

5 years ago

lol ok

anonymous

5 years ago

1. Which of the following is caused by a germ cell mutation?
"Germ cells" are cells that eventually become sex cells.
So, a "germ cell mutation" is what we call a birth defect.
Do you know what Down Syndrome is?
It's a genetic birth defect.
And it happens when someone has an extra chromosome,
in chromosome pair #21.
~~~~~~~~~~~~~~~~
2. Environmental and lifestyle factors contribute to somatic mutations. Which of the following is a lifestyle factor?
"Lifestyle factors" are the ways that people choose to live their lives.
Take a look at D - smoking tobacco.
That's cigarette smoking, which is a lifestyle factor.
It's something that we deliberately choose to do, with our bodies.
And it affects our health.
~~~~~~~~~~~~~~~
3. A network of canals that is covered with ribosomes is called ___________.
Take a look at this picture:
http://diseasespictures.com/wp-content/uploads/2012/07/Endoplasmic-Reticulum.jpg
It's a picture of the Rough Endoplasmic Reticulum.
See how it's covered in ribosomes?
That's the one that the question is asking about.
The Golgi Apparatus does package the ribosomes,
but it is not the organelle that is actually COVERED IN ribosomes.
~~~~~~~~~~~~~~~~~~~~~
4. If the nucleotide sequence of a strand of complementary DNA is GTAA, what is the nucleotide sequence on the parent strand of DNA?
This is how base pairs of DNA match up:
A goes with T
G goes with C
Now, let's take a look at our DNA strand:
G T A A
That means that the complimentary strand would be...
C A T T
You see?
Once again...
Original DNA: G T A A
Complementary DNA: C A T T
See how the letters match up?
A goes with T
G goes with C